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Buying a 2009 Prius with 425k miles, still runs and drives well!

Discussion in 'Gen 2 Prius Main Forum' started by highmilesgarage, Apr 17, 2024.

  1. highmilesgarage

    highmilesgarage Active Member

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    Yes, I got crazy and insane for buying a 425k miles Prius that has a "mysterious disappearing coolant issue" on both engine and inverter. Surprisingly this car still runs with no symptoms of head gasket issue. I'm sure it overheated several times and being a Toyota it will not blow up right away (I believe so!)

    Will be investigating for the next few days on why the coolant is disappearing.

     
    #1 highmilesgarage, Apr 17, 2024
    Last edited: Apr 17, 2024
  2. highmilesgarage

    highmilesgarage Active Member

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    can the forum moderator fix the typo please, it should read 425k miles instead of 245k. Thanks.
     
  3. PriusCamper

    PriusCamper Senior Member

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    Wow... 425K miles? That's an impressive roll of the dice. What was the price?
     
  4. highmilesgarage

    highmilesgarage Active Member

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    $1,100 - seller has difficulty selling at her asking price due to her being honest about the condition of the car. Most of the seller will not disclose the issue until you found it yourself.
     
    bisco and PriusCamper like this.
  5. Tombukt2

    Tombukt2 Senior Member

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    There's a lady here in town that has one and that $425,000 includes the original battery that still working apparently just fine I put a break actuator in the car. And her car is in beautiful condition it would get $4,000 without any trouble even with the mileage and the car drives stellar and it's clean.
     
  6. Tideland Prius

    Tideland Prius Moderator of the North
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    Done
     
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  7. pasadena_commut

    pasadena_commut Senior Member

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    Can disappearing coolant from the inverter loop be anything other than a leak? Put some fluorescent dye in and see where it is coming out. Anyway, it isn't like a leak in an ICE motor, where there are ways coolant can get into the oil or end up in the exhaust.

    If you can fix the coolant leaks it will be interesting to see how much oil this car burns.
     
  8. PriusCamper

    PriusCamper Senior Member

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    Just top it off... The pump is the only failure point and the coolant lines are fairly easy to inspect regularly once you clean them...
     
  9. highmilesgarage

    highmilesgarage Active Member

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    Found the sources of the leak and fixed them! Both engine and inverter cooling system has leaks.

    The inverter side has a leak caused by a pinhole size in the radiator hose (near the clamp) This caused the inverter pump to loose coolant. Probably the weather in MO is just too cold not to trigger the code. The other leak was caused by a hack made by the original owner before selling it to the unsuspecting lady. The 3 way coolant valve failed and to provide heat during the winter it was bypassed using a coupler to connect the hose from the engine to the heater pump. The hose to the storage tank was also blocked using Harbor Freight hose clamps. The 3 way coolant valve wasn't sealed closed so it still leaks when under pressure (and the clamp is not enough to block the coolant completely under pressure) The only code showing up is P1116 which is the coolant storage blockage code which also points to the 3 way coolant valve (I guess the p1121 will follow soon)

    Been driving the car around and so far no leaks and no signs of head gasket issue. Going to do some minor cosmetic fixes in the next few weeks.

    If you think the Catalytic is toast at this mileage, it's just inefficient and that got a fix too (hack)

     
    #9 highmilesgarage, Apr 23, 2024
    Last edited: Apr 23, 2024
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  10. highmilesgarage

    highmilesgarage Active Member

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    I noticed the hose from the pcv valve to the throttle body has some oil near the clamps, I believe oil instead of pure vapor is coming out from the pcv valve to the throttle body. I still have to open up the throttle body to determine if the blow-by is bad.
     
  11. highmilesgarage

    highmilesgarage Active Member

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    New Engine Code!

    P2601 - Range/Performance of Coolant Pump Control Circuit

    It turns out it's not the pump.
     
  12. Danno5060

    Danno5060 Member

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    With that many miles, I'd expect there's quite a few hoses that are ready for replacement. There's only so many flex/hot/cold cycles any hose can stand. Maybe get a whole set and a couple gallons of the Toyota coolant and just go for replacing all the coolant in both systems.
     
  13. highmilesgarage

    highmilesgarage Active Member

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    hoses are in excellent shape, the leak was caused by a bad mechanic not using the tool properly (punctured it)

    It's been more than a week since the code was cleared and so far these are the 2 parts that commonly fail in high mileage prius and also are easy to fix if DIY.

     
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  14. highmilesgarage

    highmilesgarage Active Member

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    it's been a while since I haven't post an update on my 425k miles 09 Prius. Yes it's racking up miles and keeping it. Doing some body work due to collision and will be painting soon. I have to check why there's no rubber grommet on the radiator post and fix the butchered install. Now I have less vibrations on the front end. Also the styrofoam bumper absorber is missing and without it the bumper cover is not flushed properly with the fenders, it will bow and detach itself. I bought the front bumper cover used for $25 with the styrofoam absorber and will definitely re-paint to match.
    No check engine lights and no overheating and no leaks!

     
  15. theory816

    theory816 Junior Member

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    Hows the battery?